Por si algún profe quiere investigar sobre estas 70 apps y ver si le son de utlidad. Yo uso algunas // The 70 Best Apps For Teachers And Students - Edudemic. These are listed as itunes apps, but I'm sure a lot of them can be found for Android as well.
Best letter learning and reading apps for kids! Another few apps that allow students to practice their hand writing as well as learning grammar. Again another way to get the students a head start on understanding how to read and write.